It can take 1 -2 weeks to break in the redox probe. I would wait 2 weeks then GENTLY clean it with a toothbrush.
You can also buy small packets of test solution to see if it needs calibrating.
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Originally Posted by Pescador
I'm just hooking up the same unit and I'm wondering if you got correct readings from your probe at once or did it take awhile to break in. Mine has been in about 24 hrs and still seems way too low. (165mv)
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